How can I store object class into a session in PHP?

Question

How can I have an object class store into PHP session and then get it in my next page as variable. Could you help?

Here is my class.inc.php

class shop {

var $shoeType;
var $color;

    public function __construct() {

        $shoeTypeService = new ShoeTypeService();
        $shoe = $shoeTypeService->getAllShoes();
        $this->shoeType = $shoe[20];
    }
}

This question has already been asked and received a comprehensive answer. Check it out: http://stackoverflow.com/questions/871858/php-pass-variable-to-next-page/872522#872522 — Oren Hizkiya, Apr 07 '11 at 09:14

score 11 · Answer 1 · answered Apr 07 '11 at 09:14

11

Once you instantiate the class you can assign it to the session (assuming it's started)

$_SESSION['SomeShop'] = new Shop();

or 

$Shop = new Shop();
//stuff
$_SESSION['SomeShop'] = $Shop;

Keep in mind that wherever you access that object you will need the Shop Class included.

answered Apr 07 '11 at 09:14

Jake

2,431
14
23

You can start the session with `session_start()` – Oren Hizkiya Apr 07 '11 at 09:16
2

__auto_load will take care of ensuring correct class file is included – Ian Wood Apr 07 '11 at 09:40
[This answer](https://stackoverflow.com/a/7083544/1150683) states otherwise: serializing is not necessary in this case. – Bram Vanroy Jun 27 '17 at 13:41

score 8 · Answer 2 · answered Sep 11 '13 at 10:27

8

used this code first page

$obj = new Object();

$_SESSION['obj'] = serialize($obj);

in second page

$obj = unserialize($_SESSION['obj']);

answered Sep 11 '13 at 10:27

Shakti Patel

3,570
4
20
29

Does not work, it still says "__PHP_Incomplete_Class_Name" in the unserialized object. – Black Sep 13 '19 at 12:21

score 3 · Answer 3 · answered Jul 03 '12 at 06:39

3

You cannot simply store an object instance into the session. Otherwise the object will not be appeared correctly in your next page and will be an instance of __PHP_Incomplete_Class. To do so, you need to serialize your object in the first call and unserialize them in the next calls to have the object definitions and structure all intact.

answered Jul 03 '12 at 06:39

Taha Kamkar

76
2

serializing and unserializing is handled very well by php internally – shxfee Jul 03 '12 at 07:11
1

to avoid the PHP_Incomplete_Class issue you need an autoloader. – Niko Sams Oct 10 '12 at 20:23
You get an incomplete class only, when you didn't include the file of the needed class. Using an autoloader or using a function like `require_once()` should solve this problem. – martinstoeckli Sep 11 '13 at 10:46
[This answer](https://stackoverflow.com/a/7083544/1150683) states otherwise: serializing is not necessary in this case. – Bram Vanroy Jun 27 '17 at 13:41

score 0 · Answer 4 · answered Jul 03 '12 at 07:18

Extending on Jakes answer It can be done with very little hassle like everything in php. Here is a test case:

session_start();

$_SESSION['object'] = empty($_SESSION['object'])? (object)array('count' => 0) : $_SESSION['object'];
echo $_SESSION['object']->count++;

It will output count increased by 1 on every page load. However you will have to be careful when you first initiate the $_SESSION variable to check whether it is already set. You dont want to over write the value everytime. So be sure to do:

if (empty($_SESSION['SomeShop']))
    $_SESSION['SomeShop'] = new Shop();

or better yet:

if (!$_SESSION['SomeShop'] instanceof Shop)
    $_SESSION['SomeShop'] = new Shop();

How can I store object class into a session in PHP?

4 Answers4

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